Is it really possible to restore a photo edited by someone to its original form? Is there any software that can do that? I will be very happy if someone can actually help me with this.
It is. But you will need an experience editor in order to do so.
If you are not a professional it would be very difficult to do it. It might be easy to add filters or other effects but it is very difficult to remove them and turn the picture to its original form.